56
Siemens · 10/2014
Project planning aids
3WL Air Circuit Breakers
3WL non-automatic air circuit breakers up to 4000 A (DC)
Size II, up to 4000 A, fixed-mounted version, 3- and 4-pole
Blue lines: 4-pole version
$ Mounting space for removal of the arc chutes
% Arc quenching space, space for electrical auxiliary circuit connections
& Grooves (4 mm wide, 5 mm deep) for supporting phase partitions
in the system
( Auxiliary connector with SIGUT screw terminals
) Auxiliary connector with spring-type connections
* Dimension to inside surface of the closed cabinet door
+ Fixing points for mounting the circuit breaker in the system
/ Terminal face
0 Circuit breaker upper edge, only 1000 V, 1150 V and circuit breakers with
breaking capacity class C, 3WL1 circuit breaker only
1 Arc quenching space, 1000 V circuit breaker facing grounded or
non-conductive surfaces
2 Space for electrical auxiliary circuit connections
3 Arc quenching space, 300 V circuit breaker facing grounded or
non-conductive surfaces
4 Arc quenching space, 600 V circuit breaker facing grounded or
non-conductive surfaces
5 Circuit breaker upper edge, only 1000 V, 1150 V and circuit breakers with
breaking capacity class C
Safety clearances to grounded parts and to live parts,
see page 41.
Standard version
Horizontal connection
Optional connection variants
Front connection (single)
Front connection (double hole)
according to DIN 43673
Vertical connection
General